diff --git a/lib/event_news_mod/engine.rb b/lib/event_news_mod/engine.rb
index 079d05e..415000a 100644
--- a/lib/event_news_mod/engine.rb
+++ b/lib/event_news_mod/engine.rb
@@ -129,7 +129,7 @@ module EventNewsMod
           authorizable
           frontend_enabled
           feeds_url "/xhr/event_news/feeds"
-          feeds_time_field (EventNewsHelper.is_postdate_sort_first ? ['postdate', 'event_date'] : ['event_date', 'postdate'])
+          feeds_time_field (::EventNewsHelper.is_postdate_sort_first ? ['postdate', 'event_date'] : ['event_date', 'postdate'])
           data_count 1..30
           begin
             show_options data